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열처리 조건이 이종접합 유기태양전지의 효율에 미치는 영향
김영훈(Y. H. Kim),한상면(S. M. Han),한민구(M. K. Han),이용욱(Y. U. Lee),한정인(J. I. Han) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
열처리 조건이 이종접합 유기태양전지(heterojunction organic photovoltaics)의 power conversion efficiency(PCE)에 미치는 영향에 대해 살펴보았다. 본 연구에서는 열처리 온도와 열처리 시간을 변수로 다양한 조건하에 유기태양전지를 제작하고 AM1.5G 조건에서의 효율 변화를 관찰하였다. 열처리 온도는 90℃, 열처리 시간은 20분에서 가장 우수한 변환효율이 관찰되었다.
High Performance Organic Phototransistors Based on Soluble Pentacene
김영훈(Y. H. Kim),이용욱(Y. U. Lee),한정인(J. I. Han),한상면(S. M. Han),한민구(M. K. Han) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
A high performance organic phototransistor with dynamic range of 120 ㏈ is demonstrated by employing soluble pentacene as a photo-sensing layer. The organic phototransistor used suspended source/drain (SSD) electrode structure, which provides a dark current level of ~ 10?¹⁴ A at positive gate bias. Under a steady-state illumination, the organic phototransistor exhibited a current modulation of 10? compared to dark to give a dynamic range of 120 ㏈. These results suggest that the organic phototransistor based on TIPS pentacene can be a new promising candidate for low-cost and high-performance photo-sensing element for digital imaging applications.
송민철(M. C. Song),이용욱(Y. U. Lee),문영훈(Y. H. Moon) 한국소성가공학회 2015 한국소성가공학회 학술대회 논문집 Vol.2015 No.5
The core process in the open die forging for a large crank throw is to bend the preform into the “V” shape blank. The preform could be bended asymmetrically due to its asymmetrical shape, uneven temperature distribution and the misalignment between preform and die. Since the asymmetrically bended blank is very difficult to correct, the proper control method shall be required to prevent it. The purpose of this study is to develop the asymmetry control method in the bending process of preform. Numerical simulation results show that the principal factor controlling asymmetrical forged product is identified as the uneven configuration of preform. The floating die was applied to the bending device to control the asymmetry of preform during bending. The validity of he suggested method was verified by the lab scale experiments.